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Finding the Fourth Proportional to 757.49, 1,130.84 and 641.16

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Solution

The fourth proportional to 757.49, 1,130.84 and 641.16 is: 957.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.49 : 1,130.84 = 641.16 : x
  2. Step 2: Convert to fraction form
    757.49/1,130.84 = 641.16/x
  3. Step 3: Cross multiply
    757.49x = 1,130.84 × 641.16
  4. Step 4: Simplify right side
    757.49x = 725,046.17
  5. Step 5: Solve for x
    x = 725,046.17/757.49
  6. Step 6: Final answer
    x = 957.17

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.